Bulk

Sync batch up to 100 items; larger jobs use async. Correlate by client_ref, never by array index.

Live: `POST /v1/links/batch` (1–100). Prefer batch for ≥2 creates.

• POST /v1/links/batch — 1–100 items
• Per-item client_ref; partial success; correlate by client_ref only
• Scope: batches:create when using Bearer